CN110878530B - Installation and construction method of steel box girder of steel structure bridge - Google Patents
Installation and construction method of steel box girder of steel structure bridge Download PDFInfo
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- CN110878530B CN110878530B CN201911377778.3A CN201911377778A CN110878530B CN 110878530 B CN110878530 B CN 110878530B CN 201911377778 A CN201911377778 A CN 201911377778A CN 110878530 B CN110878530 B CN 110878530B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 336
- 239000010959 steel Substances 0.000 title claims abstract description 336
- 238000009434 installation Methods 0.000 title claims abstract description 113
- 238000010276 construction Methods 0.000 title claims abstract description 68
- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 5
- 230000007306 turnover Effects 0.000 claims description 5
- 239000010720 hydraulic oil Substances 0.000 claims 1
- 230000032258 transport Effects 0.000 description 21
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- 230000006872 improvement Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention provides a mounting and construction method of a steel box girder of a steel structure bridge, which comprises the following steps: the first step is as follows: designing the length and the width of each section of steel box girder, processing the steel box girders in blocks, and conveying the steel box girders to an installation area for later use; step two: installing steel box girder installation construction equipment; step three: pre-splicing each block of the steel box girder, and welding each section of the steel box girder into at least 2 large blocks; step four: sequentially conveying each large block to an installation position of the steel box girder; step five: hoisting the bridge girder erection machine to place each large block of the steel box girder at the installation position; step six: the bridge girder erection machine is pushed to the installation position of the next section of steel box girder; step seven: repeating the third step and the sixth step, mounting the next section of steel box girder, connecting the splicing seams, completing the mounting of the steel box girder at the tail end, and removing the steel box girder mounting construction equipment; step eight: and (5) detecting, and finishing the installation of the steel box girder of the steel structure bridge. The installation construction method has the advantages of high efficiency, safety, reliability and low construction difficulty.
Description
Technical Field
The invention relates to the field of bridge construction, relates to a construction technology of an upper structure of a steel structure bridge, and particularly relates to an installation construction method of a steel box girder of the steel structure bridge.
Background
With the rapid development of cities and the improvement of economic level, steel structure bridges are continuously popularized, and steel box girders in various forms come into play. Because different regions have different geographical positions and complex ground conditions, the construction difficulty and the construction period of the steel structure bridge are different, and the construction requirements are different. The steel structure bridge generally comprises a bridge pier and a steel box girder erected on the bridge pier, wherein the steel box girder is also called a steel plate box girder, and is a common structural form of a large-span bridge.
At present, in areas with good terrain conditions, steel box girders are usually erected through large-scale hoisting equipment to carry out rapid and safe installation and construction. But for areas with complex ground environments, such as: in mountainous areas, large-scale equipment is difficult to enter the field due to poor terrain, a support and a hoisting method or a jacking method are mostly adopted for installation, the influence of factors such as terrain limitation of mountainous areas, the height of bridges, difficulty in erecting the support, influence of hoisting equipment on terrain and structural bearing capacity and the like is caused, and the limitation of the support and a segment hoisting method is more. Meanwhile, for steel bridges designed by flat curves and/or vertical curves, the incremental launching elevation of the position of the vertical curve needs to be adjusted at any time and the plane position needs to be adjusted in time when incremental launching construction is adopted, if the adjustment is not in time, the deformation problems such as local bulging of the steel box girder can be caused, the stress safety of the structure is influenced, and the later maintenance cost of the bridge is greatly increased. Meanwhile, large hoisting equipment or a bracket is combined with a hoisting method (or a pushing method) to install the steel box girder, so that the construction cost is high.
Disclosure of Invention
The invention aims to solve the problems of high installation and construction difficulty, low safety coefficient and high engineering cost of the steel box girder of the existing steel structure bridge, and provides an installation and construction method of the steel box girder of the steel structure bridge. The invention mainly carries out installation construction on the steel box girder by matching the modified bridge girder erection machine, the transport vehicle and the steel box girder assembly device, and has the advantages of small installation difficulty, high bridge construction efficiency and high bridge construction quality.
The technical scheme for realizing the purpose of the invention is as follows: the mounting and construction method of the steel box girder of the steel structure bridge is characterized by comprising the following steps of:
the first step is as follows: designing the length and the width of each section of steel box girder, processing each section of steel box girder in blocks along the width direction of the steel box girder, and conveying the steel box girder to an installation area for later use;
step two: installation of steel box girder installation construction equipment: the method comprises the steps of installing a bridge girder erection machine, a transport vehicle and a steel box girder assembly device, wherein the bridge girder erection machine, the transport vehicle and the steel box girder assembly device are installed at the initial end of the steel structure bridge construction;
step three: placing each block of the steel box girder on a steel box girder assembling tire seat of a steel box girder assembling device for pre-assembling, and welding each section of the steel box girder into at least 2 large blocks;
step four: sequentially conveying each large block of the welded steel box girder to an installation position of the steel box girder by using a transport vehicle;
step five: feeding beams: hoisting the large blocks of the steel box girder at the installation position by the bridge girder erection machine, and connecting the large connecting joints to complete the installation construction of the section of the steel box girder;
step six: the bridge girder erection machine is pushed forward to the installation position of the next section of steel box girder to prepare for installation of the next section of steel box girder;
step seven: repeating the third step and the sixth step, installing the next section of steel box girder, connecting the splicing seams of the two sections of steel box girders until the steel box girder at the tail end of the steel structure bridge is installed, and removing the steel box girder installation construction equipment;
step eight: installing two side flange plates of the steel box girder, the front section of which is not influenced by the bridge girder erection machine;
step nine: and detecting the adjacent two sections of steel box girders and the splicing seam of each section of steel box girder, and carrying out turnover test on a steel box girder stress system of the steel structure bridge to complete the installation of the steel box girder of the steel structure bridge.
The installation and construction method of the steel box girder provided by the invention has the advantages that the steel box girder is spliced and installed in blocks by utilizing the characteristics of safety and rapidness in installing the steel box girder by a bridge girder erection machine according to the restrictions of mountainous terrain, the installation difficulty of the steel box girder is reduced, the installation speed is accelerated, and the construction quality is ensured.
Further, step five; and the welding seams among the large blocks of each section of steel box girder are connected through the stacking plates. And step seven, connecting the splicing seams of the two adjacent sections of steel box girders or each section of steel box girder by using a stacking plate.
And furthermore, in the second step, the steel box girder assembling device is arranged at the abutment roadbed position of the steel structure bridge.
Preferably, the steel box girder assembling device comprises 2 lifting beam gantry cranes and 2 electric hoists, and steel box girder assembling tire seats are arranged on the ground between the 2 lifting beam gantry cranes. The steel box girder assembling tire seat is used for splicing each section of steel box girder to form an integral steel box girder or a plurality of blocks of the steel box girder, so that the steel box girder or the plurality of blocks of the steel box girder can be conveniently installed at the corresponding positions. 2 setting of handle portal crane and 2 electric hoist can ensure that it lifts steel case roof beam to stable placing improves the security of operation on the transport vechicle.
And further, in the second step, the bridge girder erection machine is arranged at the installation position of the steel box girder of the steel structure bridge, and the bridge girder erection machine is synchronously pushed forward to the installation position of the next section of the steel box girder along with the installation and construction of the steel box girder.
Preferably, the front supporting leg supporting beam of the bridge girder erection machine is arranged on the abutment roadbed or on the upper surface of the installed steel box girder, and 2 front supporting legs of the bridge girder erection machine are respectively detachably fixed at two ends of the front supporting leg supporting beam;
a middle supporting leg supporting beam of the bridge girder erection machine is arranged on the upper surface of the installed steel box girder, and 2 middle supporting legs and 2 transverse trolleys of the bridge girder erection machine are respectively detachably fixed at two ends of the middle supporting leg supporting beam;
a rear supporting leg supporting beam of the bridge girder erection machine is arranged on a pier column of a front-end steel box girder to-be-installed position of the steel structure bridge, and 2 rear supporting legs of the bridge girder erection machine are detachably fixed at two ends of the rear supporting leg supporting beam respectively;
the front supporting leg, the middle supporting leg and the rear supporting leg of the bridge girder erection machine are respectively provided with a hydraulic cylinder, and the hydraulic cylinders are used for supporting the front supporting leg, the middle supporting leg and the rear supporting leg of the bridge girder erection machine to suspend in the air and slide forwards to the next installation position through the transverse trolley.
Compared with the prior art, the beneficial effects of the invention are as follows: according to the restriction of mountainous terrain, the steel box girder is spliced and installed in blocks by utilizing the safe and quick characteristics of the bridge girder erection machine, the installation difficulty of the steel box girder is reduced, the installation speed is accelerated, and the construction quality is ensured.
Drawings
FIG. 1 is a flow chart of the installation and construction method of the steel box girder of the steel structure bridge;
FIG. 2 is a bridge-type vertical plane layout view of the steel structure bridge of the present invention;
FIG. 3 is a bridge section layout view of the steel structure bridge of the present invention;
FIG. 4 is a schematic block diagram of steel box girder processing according to embodiment 1 of the present invention;
fig. 5a is a schematic view of pre-assembly of a steel box girder in the steel box girder assembly device in embodiment 1 of the present invention;
FIG. 5b is a schematic view showing the first bulk installation of the steel box girder according to embodiment 1 of the present invention;
FIG. 5c is a schematic view showing the second block installation of the steel box girder according to example 1 of the present invention;
FIG. 6 is a schematic block diagram of steel box girder processing according to embodiment 2 of the present invention;
fig. 7a is a schematic view of pre-assembly of steel box girders in a steel box girder assembly device in embodiment 2 of the invention;
FIG. 7b is a schematic view showing the first bulk installation of the steel box girder in example 2 of the present invention;
FIG. 7c is a schematic view showing the second block installation of the steel box girder in example 2 of the present invention;
FIG. 7d is a schematic view showing the second block installation of the steel box girder in example 2 of the present invention;
FIG. 8a is a front leg layout view of the bridge girder erection machine of the present invention;
FIG. 8b is a layout view of the middle leg of the bridge girder erection machine;
FIG. 8c is a rear leg layout view of the bridge girder erection machine of the present invention;
FIG. 9a is a side view of the steel structure bridge of the present invention shown in FIG. 1;
FIG. 9 a' is a top view of FIG. 9a in accordance with the present invention;
FIG. 9b is a side view of the steel structure bridge of the present invention;
FIG. 9 b' is a top view of FIG. 9b in accordance with the present invention;
FIG. 9c is a side view of the steel structure bridge of the present invention;
FIG. 9 c' is a top view of FIG. 9c in accordance with the present invention.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The specific embodiment provides an installation and construction method of a steel box girder of a steel structure bridge, a flow chart of the installation and construction method of the steel box girder is shown in fig. 1, and the installation and construction method of the steel box girder 3 comprises the following steps:
the first step is as follows: designing the length and the width of each section of the steel box girder 3, processing each section of the steel box girder 3 along the width direction of the steel box girder 3 in a blocking manner, and conveying the steel box girder to an installation area for later use;
step two: installation of steel box girder installation construction equipment: the method comprises the steps of installing a bridge girder erection machine 4, a transport vehicle 2 and a steel box girder assembly device 1, wherein the bridge girder erection machine 4, the transport vehicle 2 and the steel box girder assembly device 1 are installed at the initial end of steel structure bridge construction;
step three: placing each block of the steel box girder on a steel box girder assembling tire seat of the steel box girder assembling device 1 for pre-assembling, and welding each section of the steel box girder 3 into at least 2 blocks;
step four: sequentially conveying each large block of the welded steel box girder 3 to an installation position of the steel box girder 3 by using a transport vehicle 2;
step five: feeding beams: the bridge girder erection machine 4 lifts and places each large block of the steel box girder 3 at the installation position, and connects each large block of the connection joint to complete the installation construction of the section of the steel box girder 3;
step six: the bridge girder erection machine 4 is pushed forwards to the installation position of the next section of steel box girder 3 to prepare for installing the next section of steel box girder 3;
step seven: repeating the third step and the sixth step, installing the next section of steel box girder 3, connecting the splicing seams of the two sections of steel box girders 3 until the steel box girder 3 at the tail end of the steel structure bridge is installed, and removing the steel box girder installation construction equipment;
step eight: sequentially installing flange plates on two sides of the steel box girder 3, the front section of which is not influenced by the bridge girder erection machine 4;
step nine: and (3) detecting the splicing seams of the two adjacent sections of steel box girders 3 and each section of steel box girder 3, carrying out turnover test on the stress system of the steel box girder 3 on the steel structure bridge, and finishing the installation of the steel box girder 3 of the steel structure bridge.
The installation and construction method of the steel box girder 3 provided by the invention is characterized in that the steel box girder 3 is spliced and installed in blocks by utilizing the characteristic that the bridge girder erection machine 4 is safe and quick according to the restrictions of mountainous terrain, so that the installation difficulty of the steel box girder 3 is reduced, the installation speed is increased, and the construction quality is ensured.
The following description is given in detail by taking the installation of a steel box girder of a steel structure bridge in a certain mountain area as an example, the width of a top plate of the steel structure is 1200cm, the width of a bottom plate of the steel structure is 900cm, the height of the bridge girder is 1.4-2.2 m, the bridge type arrangement is shown in fig. 2, the bridge type section arrangement is shown in fig. 3, the local terrain is steep, the bridge spans a river, large hoisting equipment cannot enter the site, the steel box girder cannot be transported to a construction site by adopting a large section, the bridge has a vertical curve, and the construction by adopting a support, a section hoisting method, a top pushing method and the like has certain difficulty.
Example 1:
the embodiment provides an installation and construction method of a steel box girder, each block of the steel box girder 3 is placed on a steel box girder assembling tire seat at a steel box girder assembling device 1 for pre-assembling, each block is positioned, each section of the steel box girder 3 is spliced into 2 blocks, the 2 blocks are respectively transported to an installation position for installation, the construction efficiency of the steel box girder 3 is high, and the bridge installation can be ensured to be completed and put into use according to the design in due time.
Generally, the width of the main girder of the conventional bridge girder erection machine 4 is usually 500-700 cm, and in order to be suitable for the width of the bridge in this embodiment, the bridge girder erection machine 4 needs to be properly modified so as to meet the installation requirement of the steel box girder 3 in this embodiment, the width of the main girder of the bridge girder erection machine 4 is adjusted to 1200 cm.
The installation and construction method of the steel box girder comprises the following steps:
the first step is as follows: due to the limitation of transportation roads and storage sites, each section of steel box girder 3 is divided into a plurality of small blocks, and the small blocks are transported to the abutment roadbed section for storage and assembly, the section of each steel box girder block adopted on site is shown in figure 4, each section of steel box girder 3 is divided into 6 small blocks, the width of each block is shown in figure 4, and the length of each block of steel box girder 3 needs to be controlled within the allowable range of roads. Specifically, the length and the width of each section of steel box girder 3 are designed, and each section of steel box girder is processed in a block mode along the width direction of the steel box girder 3 and is conveyed to an installation area for later use;
step two: installation of steel box girder installation construction equipment: the method comprises the steps of installing a bridge girder erection machine 4, a transport vehicle 2 and a steel box girder assembly device 1, wherein the bridge girder erection machine 4, the transport vehicle 2 and the steel box girder assembly device 1 are installed at the initial end of steel structure bridge construction;
step three: the steel box girder assembling device 1 is used for assembling the steel box girder 3 to be installed, specifically, each block of the steel box girder 3 is placed on the steel box girder assembling tire seat of the steel box girder assembling device 1 for pre-assembling, and each section of the steel box girder 3 is welded into 2 large blocks, as shown in fig. 5 a.
Step four: the transport vehicle 2 sequentially transports 2 large blocks of the assembled steel box girder 3 to the installation position of the steel box girder 3, as shown in fig. 5b and fig. 5 c;
step five: feeding beams: the bridge girder erection machine 4 sequentially lifts and places 2 large blocks of the steel box girder 3 at the installation position, and connects the 2 large connecting joints to complete the installation construction of the section of the steel box girder 3;
step six: the bridge girder erection machine 4 is pushed forwards to the installation position of the next section of steel box girder 3 to prepare for installing the next section of steel box girder 3;
step seven: repeating the third step and the sixth step, installing the next section of steel box girder 3, connecting the splicing seams of the two sections of steel box girders 3 until the steel box girder 3 at the tail end of the steel structure bridge is installed, and removing the steel box girder installation construction equipment;
step eight: installing two side flange plates of the steel box girder 3, the front section of which is not influenced by the bridge girder erection machine 4;
step nine: and (3) detecting the splicing seams of the two adjacent sections of steel box girders 3 and each section of steel box girder 3, carrying out turnover test on the stress system of the steel box girder 3 on the steel structure bridge, and finishing the installation of the steel box girder 3 of the steel structure bridge.
Example 2:
the embodiment provides another installation and construction method of a steel box girder, and the difference between the embodiment and the embodiment 1 is as follows: the steel box girders 3 are spliced into a plurality of large blocks at the steel box girder splicing device 1, and are respectively transported to installation positions through transport vehicles to be sequentially installed.
Generally, the width of the main girder of the conventional bridge girder erection machine is usually 500-700 cm, and the width of the main girder of the conventional bridge girder erection machine is required to be properly modified to meet the installation requirement of the steel box girder of the embodiment in order to be suitable for the width of the bridge girder of the embodiment, in the embodiment, the width of the main girder of the bridge girder erection machine 4 is adjusted to 1200 cm.
The installation and construction method of the steel box girder comprises the following steps:
the first step is as follows: each section of steel box girder 3 is divided into a plurality of small blocks due to the limitation of transportation roads and storage sites, and is transported to a bridge abutment roadbed section for storage and assembly, the section of each steel box girder block adopted on site is shown as the following figure 6, each section of steel box girder 3 is divided into 7 small blocks, the width of each block is shown as the figure 6, the length of each block of steel box girder 3 needs to be controlled within the allowable range of the road, the length and the width of each section of steel box girder 3 are designed, and each section of steel box girder is processed in a block mode along the width direction of the steel box girder 3 and is transported to an installation area for standby;
step two: installation of steel box girder installation construction equipment: the method comprises the steps of installing a bridge girder erection machine 4, a transport vehicle 2 and a steel box girder assembly device 1, wherein the bridge girder erection machine 4, the transport vehicle 2 and the steel box girder assembly device 1 are installed at the initial end of steel structure bridge construction;
step three: the steel box girder assembling device 1 is used for assembling the steel box girder 3 to be installed, as shown in fig. 7a, specifically, each block of the steel box girder 3 is placed on the steel box girder assembling tire seat of the steel box girder assembling device 1 for pre-assembling, and each section of the steel box girder 3 is welded into 3 blocks. Specifically, if splicing and welding are carried out on blocks 2-3 in fig. 6, splicing and welding are carried out on blocks 5-6, and the blocks 5 are independently arranged), 2 large blocks are sequentially conveyed to an installation position through a transport vehicle 2 and are sequentially hoisted in place through a bridge girder erection machine 4, so that the loads of the installation of the steel box girder splicing device 1, the transport vehicle 2 and the bridge girder erection machine 4 can be reduced, the service lives of the installation of the steel box girder splicing device 1, the transport vehicle 2 and the bridge girder erection machine 4 are prolonged, the operation safety can be improved, and safety accidents are avoided;
step four: the transport vehicle 2 sequentially transports 3 large blocks of the assembled steel box girder 3 to the installation position of the steel box girder 3;
step five: feeding beams: the bridge girder erection machine 4 sequentially lifts and places 3 large blocks of the steel box girder 3 at the installation position, and connects the 3 large connecting joints to complete the installation construction of the section of the steel box girder 3, as shown in fig. 7b to 7 d;
step six: the bridge girder erection machine 4 is pushed forwards to the installation position of the next section of steel box girder 3 to prepare for installing the next section of steel box girder 3;
step seven: repeating the third step and the sixth step, installing the next section of steel box girder 3, connecting the splicing seams of the two sections of steel box girders 3 until the steel box girder 3 at the tail end of the steel structure bridge is installed, and removing the steel box girder installation construction equipment;
step eight: installing two side flange plates of the steel box girder 3, the front section of which is not influenced by the bridge girder erection machine 4;
step nine: and (3) detecting the splicing seams of the two adjacent sections of steel box girders 3 and each section of steel box girder 3, carrying out turnover test on the stress system of the steel box girder 3 on the steel structure bridge, and finishing the installation of the steel box girder 3 of the steel structure bridge.
In the sixth step of the embodiments 1 and 2, the splicing seams of two adjacent sections of steel box girders or each section of steel box girder are connected by using the stacking plates.
It should be noted that each section of steel box girder 3 can be divided into more than 7 small blocks according to the width of the bridge, and the small blocks can be welded into 4 or 5 or 6 large blocks for splicing installation according to the actual situation of the bridge girder erection machine during installation and construction.
And in the second step, the steel box girder assembling device 1 is arranged at the abutment roadbed position of the steel structure bridge.
Specifically, as shown in fig. 5a and 7a, the steel box girder assembling device 1 includes 2 girder gantry cranes 11 and 2 electric hoists 12, and a steel box girder assembling tire seat 13 is arranged on the ground between the 2 girder gantry cranes 11. The steel box girder assembling tire seat 13 is used for assembling each section of the steel box girder 3 to form a whole steel box girder 3 or a plurality of blocks of the steel box girder 3, so that the steel box girder 3 or the plurality of blocks of the steel box girder 3 can be conveniently installed at corresponding positions. The arrangement of 2 handle portal cranes 11 and 2 electric hoists 12 can ensure that it lifts up the steel box girder to stable placing on the transport vechicle improves the security of operation.
And in the second step, the bridge girder erection machine 4 is arranged at the installation position of the steel box girder 3 of the steel structure bridge, and the bridge girder erection machine 4 synchronously forwards pushes to the installation position of the next section of the steel box girder 3 along with the installation and construction of the steel box girder 3.
Specifically, as shown in fig. 8a, a front leg support beam 42 of the bridge girder erection machine 4 is arranged on the abutment roadbed or on the upper surface of the installed steel box girder 3, and 2 front legs 41 of the bridge girder erection machine are respectively detachably fixed at two ends of the front leg support beam 42;
as shown in fig. 8b, a middle support beam 43 of the bridge girder erection machine is arranged on the upper surface of the installed steel box girder 3, and 2 middle supports 44 and 2 traverse trolleys 45 of the bridge girder erection machine 4 are respectively and detachably fixed at two ends of the middle support beam 43;
as shown in fig. 8c, the rear leg support beams 46 of the bridge girder erection machine 4 are arranged on the pier stud 5 of the front end steel box girder of the steel structure bridge where the steel box girder is to be installed, and 2 rear legs 47 of the bridge girder erection machine 4 are respectively detachably fixed at two ends of the rear leg support beams 46;
further, the front support leg 41, the middle support leg 44 and the rear support leg 47 of the bridge girder erection machine 4 are all provided with hydraulic cylinders, and the hydraulic cylinders are used for supporting the front support leg 41, the middle support leg 44 and the rear support leg 47 of the bridge girder erection machine 4 to suspend in the air and slide forwards to a next installation position through the transverse trolley 45.
The installation and construction of the steel box girder 3 of the steel structure bridge according to the embodiment 1 and the embodiment 2 are shown in fig. 9a, 9b, 9c, 9a ', 9b ', and 9c '.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The mounting and construction method of the steel box girder of the steel structure bridge is characterized by comprising the following steps of:
the first step is as follows: designing the length and the width of each section of steel box girder, processing each section of steel box girder in blocks along the width direction of the steel box girder, and conveying the steel box girder to an installation area for later use; due to the limitation of transportation roads and storage sites, each section of steel box girder is divided into a plurality of small blocks, the small blocks are transported to the abutment roadbed section for storage and assembly, and the length of each block of steel box girder is controlled within the allowable range of the road;
step two: installation of steel box girder installation construction equipment: the method comprises the steps of installing a bridge girder erection machine, a transport vehicle and a steel box girder assembly device, wherein the bridge girder erection machine, the transport vehicle and the steel box girder assembly device are installed at the initial end of the steel structure bridge construction; the conventional bridge girder erection machine is reformed, so that the mounting requirement of the steel box girder can be met; the front supporting leg supporting beam of the bridge girder erection machine is arranged on the abutment roadbed or the upper surface of the installed steel box girder, and 2 front supporting legs of the bridge girder erection machine are respectively detachably fixed at two ends of the front supporting leg supporting beam; a middle supporting leg supporting beam of the bridge girder erection machine is arranged on the upper surface of the installed steel box girder, and 2 middle supporting legs and 2 transverse trolleys of the bridge girder erection machine are respectively detachably fixed at two ends of the middle supporting leg supporting beam; a rear supporting leg supporting beam of the bridge girder erection machine is arranged on a pier column of a front-end steel box girder to-be-installed position of the steel structure bridge, and 2 rear supporting legs of the bridge girder erection machine are detachably fixed at two ends of the rear supporting leg supporting beam respectively; hydraulic oil cylinders are arranged on the front supporting leg, the middle supporting leg and the rear supporting leg of the bridge girder erection machine, and are used for supporting the front supporting leg, the middle supporting leg and the rear supporting leg of the bridge girder erection machine to be suspended and sliding forwards to the next installation position through the transverse trolley;
step three: placing each block of the steel box girder on a steel box girder assembling tire seat of a steel box girder assembling device for pre-assembling, and welding each section of the steel box girder into 3 large blocks; the steel box girder assembling device comprises 2 lifting beam gantry cranes and 2 electric hoists, and a steel box girder assembling tire seat is arranged on the ground between the 2 lifting beam gantry cranes; the steel box girder assembling tire seat is used for splicing each section of steel box girder to form an integral steel box girder or a plurality of blocks of the steel box girder, so that the steel box girder or the plurality of blocks of the steel box girder can be conveniently arranged at corresponding positions;
step four: sequentially conveying each large block of the welded steel box girder to an installation position of the steel box girder by using a transport vehicle;
step five: feeding beams: hoisting the large blocks of the steel box girder at the installation position by the bridge girder erection machine, and connecting the large connecting joints to complete the installation construction of the section of the steel box girder; firstly, a first big block is arranged in the middle of a front supporting leg support beam of a bridge girder erection machine, then a second big block is arranged on one side of the middle of the front supporting leg support beam of the bridge girder erection machine, and then a third big block is arranged on the other side of the middle of the front supporting leg support beam of the bridge girder erection machine;
step six: the bridge girder erection machine is pushed forward to the installation position of the next section of steel box girder to prepare for installation of the next section of steel box girder;
step seven: repeating the third step and the sixth step, installing the next section of steel box girder, connecting the splicing seams of the two sections of steel box girders until the steel box girder at the tail end of the steel structure bridge is installed, and removing the steel box girder installation construction equipment;
step eight: installing two side flange plates of the steel box girder, the front section of which is not influenced by the bridge girder erection machine;
step nine: and detecting the adjacent two sections of steel box girders and the splicing seam of each section of steel box girder, and carrying out turnover test on a steel box girder stress system of the steel structure bridge to complete the installation of the steel box girder of the steel structure bridge.
2. The installation and construction method of the steel box girder of the steel structure bridge as claimed in claim 1, wherein: step five; the welding seams among the large blocks of each section of steel box girder are connected through the stacking plates;
and step seven, connecting the splicing seams of the two adjacent sections of steel box girders or each section of steel box girder by using a stacking plate.
3. The installation and construction method of the steel box girder of the steel structure bridge as claimed in claim 1, wherein: and in the second step, the steel box girder assembling device is arranged at the abutment roadbed position of the steel structure bridge.
4. The installation and construction method of the steel box girder of the steel structure bridge as claimed in claim 3, wherein: the steel box girder assembling device comprises 2 lifting beam gantry cranes and 2 electric hoists, and steel box girder assembling tire seats are arranged on the ground between the 2 lifting beam gantry cranes.
5. The installation and construction method of the steel box girder of the steel structure bridge as claimed in claim 1, wherein: and step two, the bridge girder erection machine is arranged at the installation position of the steel box girder of the steel structure bridge, and the bridge girder erection machine is synchronously pushed forward to the installation position of the next section of the steel box girder along with the installation and construction of the steel box girder.
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| CN111851307A (en) * | 2020-08-03 | 2020-10-30 | 中交一公局集团有限公司 | Construction method of large-span prefabricated corrugated web composite box girder transport frame |
| CN112627038A (en) * | 2020-12-17 | 2021-04-09 | 江苏恒睿杰钢结构工程有限公司 | Installation and construction method of steel box girder of steel structure bridge |
| CN113322814B (en) * | 2021-05-10 | 2022-08-23 | 中国建筑第六工程局有限公司 | Construction method of cable-stayed bridge steel box girder spanning multiple obstacles |
| CN114574823A (en) * | 2022-03-03 | 2022-06-03 | 宁波江丰电子材料股份有限公司 | Welding structure for improving deformation phenomenon of tungsten target in diffusion welding process |
| CN114808720A (en) * | 2022-05-05 | 2022-07-29 | 广西路桥工程集团有限公司 | Steel box girder installation construction platform |
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